I believe that www.yojijukugo.com has a pretty thorough list of 四字熟語? Is there a better site?
However, I know that I've seen a lot of 4, or more, adjacent kanji that are not listed as 熟語。An example ...

This question came to my mind while playing 漢字読めるカナ for Android to pass time.
温故知新 is a 4-character idiom from the 論語, Confucian Analects, meaning to learn from the past.
It is a Chinese phrase* and ...

In Chinese, usage of 四字熟語 a lot usually demonstrates sophistication and things like political announcements etc that want to sounds powerful and sophisticated use a big load of them. What does using ...

I have found a small Shodo fragment stating "一味一禪" - which is not the classical "Zen and Tea are of one taste" (禅茶一味).
What is this supposed to mean? Is it correct Japanese (I suppose it is, coming ...

In my experience, Chinese language learners are introduced to these 4-character phrases at an early stage (around Chinese 3 in my high school); what I want to know is there a certain aptitude level ...

This particular 四字熟語 is exactly the same as the proverb in English, "kill two birds with one stone." I find it to be a strange coincidence that both would have this phrase independently of each other, ...